1. Production of small internal burr precision galvanized welded pipe:
Eliminating weld burr is an important aspect of the product quality of precision galvanized welded pipe. Therefore, the effective way to solve this problem is to choose the appropriate welding method from the welding process. These welding methods are characterized by uniform heating, smooth welding, good quality, small internal burr formation, generally only 0.1 to 0.2mm.
2. Production of high-precision steel tube thin-walled welded pipe by micro beam plasma method:
微束等离子焊接薄壁管焊接方法,焊接明亮,光滑,焊缝内部形成密实,毛刺高度一般不超过0.031 ~ 0.020㎜,椭圆度后焊钢管直径是0.10 ~ 0.23㎜,不同壁厚是0.020 ~ 0.034㎜,椭圆冷轧后,通过一系列有效地消除了直径,壁厚差异是0.002 ~ 0.007㎜,质量完全满足精密无缝薄壁管的水平。经热处理后与无缝钢管具有相同的结构和性能，用无缝钢管生产极薄管材的经济效益不如焊后冷轧管材。
The welding method of micro plasma welding thin-walled tube is bright and smooth. The internal formation of the weld is dense. The burr height is generally not more than 0.031 ~ 0.020 mm. The diameter of the welded tube after ovality is 0.10 ~ 0.23 mm, and the different wall thickness is 0.020 ~ 0.034 mm. After the oval cold rolling, the diameter is effectively eliminated through a series of columns. The wall thickness difference is 0.002 ~ 0.007 mm, and the quality fully meets the level of the precision seamless thin-walled tube. After heat treatment, it has the same structure and performance as seamless steel tube. The economic benefit of producing extremely thin tube with seamless steel tube is not as good as that of cold rolling tube after welding.
3. High strength welded pipe for automobile industry:
In recent years, the automotive industry at home and abroad has been promoting lightweight automotive energy saving, so it is urgent to replace solid parts with high-strength hollow parts. It is technically feasible to develop high strength welded pipe instead of seamless pipe, which can meet the needs of automobile industry. Japan has successively developed c-ti-b, C-Mn-Nb, c-cr-ai-b and other steel series for high-strength welded pipe of automobile industry, and adopted different heat treatment systems according to different purposes, such as annealing, normalizing, quenching, tempering, etc. The standard strength grades of high-strength welded pipes used in automobile industry are 561mpa, 637mpa, 980mpa, etc. In addition to high strength, butt welded pipe also requires high plasticity, good processing performance, hardenability, strength, toughness and fatigue strength.
The above is the relevant content introduced by Jinan galvanized pipe manufacturer. For more information, please visit the website: http://www.jnxxjm.com